Air conditioning apparatus



Oct. 9, 1945. EBERHART 2,386,303

AIR CONDITIONING APPARATUS Filed Feb. 21, 1944 2 Sheets-Sheet 1 WITNESSES:

INVENTOR 15 W4 M51! i; firth/r A! fiber/95W Oct. 9, 1945. RT 2,386,303

AIR CONDITIONING APPARATUS Filed Feb. 21, 1944 2 Sheets-Sheet 2 I06 108 #3 I6 I00 WITNESSES: INVENTOR M MW ATTORNEY Patented Oct. 9, i945 assasos Am conm'rromo APPARATUS" Arthur H. Eberhart, Springfield, Mala, assignor to Westinghouse Electric Corporation, But Pittsburgh, Pa... a corporation of Pennsylvania Application February 21, 1844, Serial No. 523,241

88 for discharging the air moved by the fan 88 3 Claims.

My invention relates to air conditioning apparatus and more particularly to a self-contained window-mounted air conditioning unit of the type used for conditioning air in a room or the like.

One object of my invention is to produce an improved air conditioning unit of the type set forth.

Air conditioning units of the general character described include a condenser for cooling and liqueiying the compressed refrigerant, and a blower for blowing air over said condenser. The operation of an apparatus of this kind is accomplished by considerable noise.

It is, therefore, a further object of my invention to produce an improved construction by means of which noise incidental to the operation of the condenser blower and the flow of air over the condenser is reduced.

A still further object of my invention is to accomplish the foregoing object by simple and inexpensive means and without increasing the size of the unit or complicating its manufacture and assembly.

These and other objects are effected by my invention as will be apparent from the following description and claims taken in connection with the accompanying drawings, forming a part of this application, in which:

Fig. 1 is a view, partly in plan and partly in horizontal section, showing a window-mounted air conditioning unit embodying my invention;

Fig. 2 is a vertical sectional view, on a reduced scale, taken on line IIII of Fig. 1;

Fig. 3 is a section on line IIIIII of Figs. 1 and 4; and

Fig. 4 is a section on line IV-IV of Figs. 1 and 3.

In Fig. 1 of the drawings there is shown an air conditioning unit including a pan l8 adapted to be mounted on a window sill l2 by any suitable means not shown. The pan I8 is divided by a. vertical partition 14 into an inner portion which projects into the room and an outer portion which projects outside of the room. A removable finished cover l8 cooperates with the pan l8 and partition l4 to provide an inner compartment l8 and an outer compartment 28.

The inner compartment I8 is subdivided to form a fan compartment 22, an air silencing chamber 24, an evaporator compartment 28 and a filter compartment 28. In the fan compartment 22 is a fan 38 which is housed in a conventional scroll 32 having an inlet 34 communicating with the filter compartment 28 and an outlet into the silencing chamber 24. In the evaporator compartment 28 is an evaporator 38 of any desired type. The evaporator 88 is spaced from the top and bottom of the compartment 28 to provide secondary upper and lower air silencing spaces 48 and 42. As will be seen from Fig. 2, the lower space 42 communicates with the air silencing chamber 24 through an orifice 44 formed in the lower portion of the back wall 48 of the evaporator compartment 28. The upper space 48 is provided with a discharge orifice 48 which is connected by a duct 88 to a grille 52 from which the conditioned air flows into the room. The chamber 24, the filter compartment 28, the space 48, and if desired, the duct 88 are lined with sound-absorbing material 84.

In the filter compartment 28 is a filter 88 which divides the compartment into a rear or outer portion 58 communicating with the inlet 84 of the fan 38 and a front or inner portion 88 communicating with a room air inlet 82. The inlet 82 may be formed by spacing the front wall 84 of the cover l8 from the front end of the unit as clearly shown in Fig. 2. The inlet 82 is controlled by a pivoted damper 88. The room air inlet 82 also communicates through a passage 88 with a passage 18 formed between the top wall 12 of the compartment and the cover 18. The passage 18 leads to the outer compartment 28. The passage 18 is controlled by a damper H.

The outer compartment 28 includes a fan compartment 14 and a condenser compartment 18. In the fan compartment 14 is a. double inlet fan 88 which is driven by a motor 82 which also drives the fan 38. As shown in Fig. 3, the fan 88 is housed in a scroll 84 which is suitably secured to front and rear supporting plates 88 by bolts or the like 88. An inlet 8|, controlled by a damper, not shown, supplies outside air to,the fan 88. The scroll 84 is provided with front and rear fan inlets 88 and a discharge outlet 82. In'the condenser compartment 18 is a condenser 84 which is connected in refrigerant flow relation with a compressor 88 and with the evaporator 88 in any well known manner. The compressor 98 is likewise connected to the evaporator 88.

In order to reduce the noise which normally accompanies the operation of the fan 88 and the passage of air between the coils of the condenser 94, the condenser is-spaced from the top and bottom ofthe condenser chamber 18 to provide a lower space 88 and an upper space I88. The lower space 88 communicates with the outlet 92 of the fan 80 and the upper space I commu- -nicates with the atmosphere through openings Operation The double inlet fan 80 draws outside air through the normally open inlet 0| and discharges a major portion of the air through the scroll outlet 02 into the space 00 below the condenser 04. Some or the air drawn by the Ian 00 will,- of course, flow over the motor 82 and compressor 06 to cool the latter. From the lower space 90, the air flows upwardly between the coils oi the condenser 94 into the space I00. From the space I00 the air flows into the atmosphere through the'openings I02 and I04 or either of them as the case may be.

It will be noted that the air from the fan 00 enters the lower portion 00 of the condenser chamber 18 in a horizontal direction, and that the air then moves upwardly between the coils of the condenser 94. This causes the sound waves carried by the air or produced in the condenser chamber I8 to impinge upon the sound deadening lining I00 in the upper space I00 where a ma- Jor portion of the sound waves is absorbed before 8 the air again changes its direction of flow and emerges in a horizontal direction through the openings I02 and I04.

It will thus be seen that by twice changing the direction of flow of the air, by spacing the con- 35 tioned and an outer portion adapted to project into the atmosphere, means dividing said outer portion into a tan chamber and a condenser chamber, a condenser disposed in said condenser chamber in spaced relation to the top and bottom thereof whereby a first air-receiving space is formed above, and a second air-receiving space is formed below, said condenser, a fan disposed in said fan chamber with the outlet of said fan discharging air in a horizontal direction directly into said second space, there being an opening in a vertical wall of said condenser chamber for discharging air in a horizontal direction from said first space to the atmosphere, and a lining of sound-deadening material for the walls of said first space.

2. In a window-mounted air conditioning unit including an inner portion adapted to project into the room the air of which is to be conditioned and an outer portion adapted to project into the atmosphere, means dividing said outer portion into a fan chamber and a condenser chamber. a condenser disposed in said condenser chamber in spaced relation to the top and bottom thereof whereby a first air-receiving space is formed above, and a second air-receiving space is formed below said condenser, a tan disposed in said fan chamber with the outlet of said fan discharging air in a horizontal direction directly 0 into said second space, there being a pair of angularly-disposed opening formed in adjacent. angularly-disposed vertical walls of said condenser chamber for discharging air in a horizontal direction from said first space to the atmosphere, and a lining of sound-deadening material ior the walls of said first space.

3. In an air conditioning unit including an inner portion adapted to project into the room the air of which i to be conditioned and an outer C and y Providing t e Space above the portion adapted to project into the atmosphere,

condenser chamber with sound insulating material, an eflicient apparatus is produced in which operational noises are substantially reduced.

While I have shown my invention in but one form, it will be obvious to those skilled in the art that it is not so limited, but is susceptible of various changes and modifications without departing from the spirit thereof, and I desire, therefore, that only such limitations shall be placed thereupon as are specifically set forth in the appended claims.

What I claim is:

1. In a window-mounted air conditioning unit including an inner portion adapted to project into the room the air of which is to be condimeans dividing said outer portion into a fan chamber and a condenser chamber, a condenser disposed in said condenser chamber in spaced relation to the top and bottom thereof whereby a first air-receiving space is formed above, and a second air-receiving space is formed below, said condenser, a fan disposed in said fan chamber with the outlet of said fan discharging air in a horizontal direction directly into one of said spaces, there being an opening in a vertical wall of said condenser chamber for discharging air in a horizontal direction from the other of said spaces tothe atmosphere, and a lining of sounddeadening material for a wall of said other space.

ARTHUR H. EBERHART. 

